Machine for making butts and hinges.



No. 869,998- PATENTED NO V. 5. 1907.

W. S. TRASK. MACHINE FOR MAKING BUTTS AND HINGBS.

APPLICATION FILED MAY 1'], 1906.

' 8 SHEETS-SHEET 1.

ms Mums :zrsns co., WASHINGTON 5..

N -'869,998.- v PATENTED NOV. 5, 1907.

W. S. TRASK.

MAGH INB FOR MAKING BUTTS AND HINGES.. APPLICATION mum MAY 17,1905.

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No. 869,998. PATENTED NOV. 5, 1907.

' w. s; TRASK.

MACHINE FOR MAKING BUTTS AND HINGES.

APPLIOATIOK FILED MAY 17, 1905. I

SHEETS-SHEET 3.

No. 869,998. PATENTED NOV. 5,.1907.

' W. S. TRASK.

MACHINE FOR MAKING BUTTS AND HINGES.

APPLICATION FILED MAY 17.1906.

8 SHEETS-SHEET 4.

Witnesses Snow/tot M mum/146. E461. 35 L 3' GH' 110138 1n: "cums Pzrsnscm. WASPIINGION,

PATENTED NOV. 5, 1907.

W. s. TRASKF MACHINE FOR MAKING BUTTS AND HINGES.

APPLIOATION FILED MAY 17,1905.

Swuwwtoz MAL/411145] 7;?As/r 16 @Ho'ww l vi/lmcmoco B SHEETS-SHEEYT 8.

PATENTED NOV. 5, 1907.

W. s. TRASK.

APPLICATION FILED MAY 17,1905.

wi/lmwaao No. 869,998- I PATENTED NOV. 5, 1907.

- W. S. TRASK.

MACHINE FOR MAKING BUTTS AND HINGES.

APPLICATION FILED MAY 17,1905.

8 SHEBTSSHERT 7- g I 155 v \\\V man-m, 11c

No. 869,998. PATENTED Nov. 5, 1907. W. s. TRASK. MACHINE FOR MAKINGBUTTS AND HINGES.

APPLICATION FILED MAY 17, 1905'.

B SHEETS-SHEET B n12 NoRQls PETERS co, WASHINGTON/D.

NITED sTaTns PATENT oFFIoE.

WILLIAM S. TRASK, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO P. &. F.CORBIN, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

MACHINE FOR MAKING- BUTTS AND HINGES.

No. 869,998. Specification of Letters Patent. Patented Nov. 5, 1907.Application filed in, 1 7, 1905. 8erial No. 260,838.

To all whom it may concern: in suitable guide-ways 5. This carrier isconnected Be it known that 1, WILLIAM S. TRASK, a citizen of to aneccentric portion of the shaft 3 by means of a link the United States,residing at New Britain, Hartford 6. As the shaft 3 revolves, thecarrier 4 ascends and county, State of Connecticut, have inventedcertain descends. The head 4 carries on each side a series of 5 new anduseful Improvements in Machines for Making cams 7, 8, 9 and 10 (seeFigs. 3 to 6). At the front the Butts and Hinges, of which the followingis a full, clear, said head 4 Carries two shapers 1111, while at therear and exact description. it carries another cam 12 (see Fig. 19).

This invention relates to automatic machines for In Fig. 7 I have shownon one side of the bed, a semaking butts and hinges, and consists incertain. novel ries of plungers 13-141516, which manipulate the 10 anduseful features of construction and combinations hinge blanks in themanner hereinafter described. of elements whereby suitable blanks may besucces- The plungers 13 14 and 15 are duplicated on the opposively fedinto such machines and rapidly delivered site side of the bed, but arenot shown in this drawing, in the form of completed butts or hinges. asit is desirable to show the supporting body of the While the apparatusis susceptible of embodiment bed plate. These opposed plungers appear inFigs. 15 in a variety of forms, the same is illustrated and de- 14, 16and 17 respectively. 17 is a plunger at the rear scribed herein in thepreferred form, no attempt being end of the bed and is employed fordriving the pin. made to show modifications, since the same may be Nowreferring to Figs. 10 to 1.3. 18 is a plunger readily devised bymechanics skilled in this art. which feeds a pair of companion hingeblanks suc- In the drawings Figure 1 is a front elevation of theencessively from the hopper to the bed plate and in front 20 tireapparatus. Fig. 2 is a relatively enlarged front of-the side plungers.The plunger 18 is operated in elevation of details of construction.Figs. '3, 4, 5, and any suitable manner, for example, by means of awalk- 6 are front elevationsof certain cams, detached. Fig. ing beam 18driven by a connecting rod 18 from an 7 is a plan view of the bed, theplungers on one side eccentric 18 mounted on a shaft 19, which latter isbeing removed. Fig. 8 is a section on the plane of the driven, fromshaft 3 by bevel gears 2020. 21 is a line a-a Fig. 7, looking in thedirection of the arrows, hopper having two chutes I arranged to receivethe a portion of the hopper being shown. Fig. 9 is a plan blanks for thehinge leaves. In Fig. 20 a plan view view of certain details, detached.Fig. 10 is a longituof two companion blanks is shown. These blanks dinalsection of the front part of the bed and adjacent comprise twoflat'pieces of metal appropriately notched parts, said section beingtaken on the plane of the line at adjacent edges to furnish projectionswhich will 50 bb, Fig. 11. Fig. 11 is a cross section of the bed on whencompleted and turned up into the proper posithe plane of the line c-cFig. 7, looking in the direction, constitute alternate registeringknuckles, through tion of the arrows. Fig. 12is a plan view of the feedwhich a pin is automatically passed to complete a plunger, detached.Fig. 13 is an end elevation thereof. hinge. A large number of theseblanks may be loaded Fig. 14 is a section on the plane of the line d dFig. 7, .into the hopper 21, the width of the hopper being such 35looking in the direction of the arrows. Fig. 15 is an as to obliquelysupport opposite blanks in the manner elevation partly in section, onthe plane of the line illustrated in Fig. 8. The bottom pair ofcompanion ee Fig. 7 Fig.16 is an elevation partly in section. on blankswill be pushed into position on the bed plate the plane of the linef-fFig. 7. Fig. 17 is an elevation by being engaged by the ends 18 18 onthe plunger partly in section on the plane of the line (7 r Fig. 7. 18.The upper surfaces of these ends are beveled to 40 Fig. 18 is anelevation partly in section on the plane of correspond with the angle ofinclination of the blanks the line hh Fig. 7. Fig. 19 is a sideelevation of cerin the hopper, so that as the plunger is reciprocatedtain parts, the bed being shown in section, on the plane only one set ofblanks will be removed from the hopof the line i i Fig. 7, looking inthe direction of the per at a time, the said inclines clearing andmoving unarrows. Fig. 20 is a plan view of a pair of companion der thesuperposed blanks in said hopper. Above the 45 blanks. bed plate is alongitudinal presser bar carrier 22, while 1 is the frame of the press.22 22 are yielding presser bars arranged to hold the 2 is the bed platecarried thereby and in turn carblanks down in the proper positionin therun-way o rying certain movable parts termed plungers which said bed.manipulate the hinge blanks in the manner hereinaf- 1 will now describethe operation of the machine, 50 ter described. These plungers areoperated in any incidentally explaining more in 'detail' certainfcasuitable manner, one preferred form of operating tures ofconstruction as the description of said opera means being hereinafterdescribed. tion proceeds.

3 is the main shaft driven from any suitable source of The firstreciprocation of the plunger 18 will push power. the two lowermostcompanion blanks into the first po- 55 4 is avertically reciprocatinghead or carrier mounted sition on the bed (see Fig. 11) in whichposition they will be located directly under the shapers 1l11. In thisposition the blanks rest upon dies 1].11, are pitched at a slightincline and spaced apart by a partition 24. The presser bars 22 will nowhold down said blanks. Upon the descent oi the head 4, the shapers 1111will impinge against the blanks and crimp the outer notched edgesthereof, causing them to conform to the contour of die 11. Upon the nextcycle oi operation of the machine another pair oi companion blanks willtake the place oi the first set oi blanks shown in Fig. 11, and they inturn will be similarly operated upon. The iorward movement of the secondset oi companion blanks will push the blanks first introduced into thesecond position, wherein they will lie between the ends of the plungers13-13 and on each side of the partition rib 2 1 (see Fig, 14). Thereciprocation oi the plungers 13 is effected by means of the cams 7.Upon the descent of the. head 4 these. cams 7 will cause the plungers 13to move ahead from the position indicated in solid lines to thatindicated in dotted lines in said figure. This movement oi the plungers13l3 completes the roll in the knuckles The introduction of the next setof companion blanks will push the first mentioned blanks into theposition indicated in Fig. 15. In this position the blanks are held downfrom above by not only the presser bars 22-22, but also by overlyingplate extensions 23-23. While the blanks are in this position trimmers2S-28, having filelike edges and carried by the head 4, descend andshape up the ends oi the several knuckles so as to give proper clearancefor the opposite knuckles which are to register therewith when the hingeleaves are brought together and assembled. The introduction oi the nextpair oi companion blanks will push the first mentioned pair oi blanksfrom the last mentioned position to a position in iront oi the ends ofplungers 14: (see Fig. 1G). The iunction oi these plungers 14 is to turnthe hinge leaves over and bring the knuckles together. These plungersare specially iormed to that end. 14 14. are rigid parts, while 14 14are yielding parts. The yielding parts are springpressed at the rear, sothat they normally stand in the advanced position shown. These plungersare operated by the cams 8. The end of the yielding parts 14" arebeveled so as to provide diverging inclines or shovel noses. The ends oithe rigid parts 14. of the plungers are beveled so as to iormconverginginclines. When these plungers 14: advance, the then completelyiormed hinge leaves are first engaged and liited by the shovel noses andthen turned by the parts 1.4 so that the leaves will be turned and overirom the position indicated in solid lines Fig. 16, to that indicated indotted lines, the knuckles oi said leaves being caused to alternatelyregister. 24 is a support in line with the partition. 24, but taperedtoward its upper edge to permit the hinge leaves to be brought together.The lower edges of the hinge leaves when thus assembled, project downsufliciently far to be engaged by the next following pair oi hingeleaves, so that when another pair oi companion blanks is introduced, theunited hinge leaves will be pushed along to the next position, in frontof the plungers 15 (see Fig. 17 wherein said hinge leaves will then besupported from below by the support 24 and irom the sides and above bymeans of the clamping jaws 15 15 of the plungcrs 1.5, when said plungers15'-15 are advanced by means oi the cams 9. When thus supported and heldthe hinge leaves are in proper position to receive the pin.

16 is a reciprocating plunger which periornis the iunction oi a pinselector, aliner and support (see l igs. lSl9). This plunger 16 isreciprocated by the earn 10. It has a hook-like end he immediately backof which is the trough for supporting a single pin.

25 is a hopper ior the pins from which they are led successivelydownward on to an L-shaped support 25". The pins are held thereon by aspring clip 25". hen the plunger 16 moves irom the position indicated indotted lines to the position indicated in solid lines, the hooked endlti" engages the lowermost pin and pulls it out oi line with theoverlying pins, the spring clip 25 receding until said pin is ireed,whereupon it slips down into the trough wherein the pin is shown at 2o.When the plunger 1 t5 advances to the position indicated in dottedlilies, this pin 20 will be brought into ulint A ment with the joinedhinge leaves and directly in iront oi the pin driver 17. When thisoccurs, the can] 12 (Fig. 19) will advance said driver and the latterwill engage the end of the pin and push it directly into the passagethrough the knuckles oi the joined hinge leaves thus completing thehinge. Theplungerslti and 17 will then recede and when the next pair oicompanion blanks are introduced they will push along the seri s oiblanks one step, and the completed hinge will drop through the spaceiorlnerly occupied by said plungers into a suitable receptacle.

If desired, suitable springs such as 27-27 may be attached to one ormore oi the plungers to iacilitatc the retraction ol' the same, therebyrelieving wear on the rear side of the cams, and also relieving any tendency oi the plung rs to jam in their guidenvays by the lifting action ofthe earns, which action is accent uated in the case oi cams having sucha steep pitch as cams l0 and 12.

The beveled extremities oi the side arms l8 ol' the plungers ]S are toall'ord a proper clearance and prevent interference between said armsand a second pair oi blanks located in the hopper 2l, above those to beadvanced. The angle of inclination corresponds to the angle oiinclination oi the blanks as they appear in Figs. 8 and ll. As theblanks stand in the hopper at an angle, it is apparent that unless theends lfi ls of the plunger corresponded thereto, the advance of saidplunger would engage more than one blank in each side oi the hopper anddamage would result. To avoid this, the ends 1S are beveled asdescribed.

It will be seen that the passage along the bed plate and between theplungers constitutes a run-way tor blanks, which as they progressthrough the same are acted upon automatically by suitable tools,translornv ing said plain blanks into finished hinge leaves ll'tlptl'lyunited and pinned.

The apparatus is simple, etlicient and durable, and by it hinges orbutts are produced in very rapid inanner. Obviously, the contour of theblanks may l c modified without departing from the spirit or scope ol'this invention.

What I claim is:

1. In a machine for rnamrl'actnrlng butts and hinges. a run-way dividedinto two parts by a longitudinal fixed partition, a longitudinallyreciprocal teed plunger l'or feeding successive sets of companion leafblanks along said run-Way step by step, successive sets of opposedreciprocal knuckle-forming devices for progressively performingdifferent forming operations upon opposite outer edges of a pair ofcompanion leaf blanks while in said 'run-way, the central partitionreceiving the thrust of said devices, each set of knuckle-formingdevices being located at intervals equal to the length of the blanks,means for supplying mechanically to said run-Way partially formedleaves, and means for moving the said feed plunger at each stroke adistance not less than the length of each leaf blank, theknuckle-forming movement of. said forming means occurring in alternationwith the forward nlcvement of said feed plunger.

2. In a machine for manufacturing butts and hinges, a bed having alongitudinal and centrally divided run-way,

a longitudinally movable feed plunger adapted to operate in bothdivisions at one end of said run'-\vay, a longitudinally movablepin-driving plunger operable at the opposite end of said run-way andlocated centrally relatively thereto but above the same, a plurality ofsets of laterally movable plungers located along each side of saidrun-way for progressively performing different knuckle formingoperations upon the opposite blanks of each set while the latter aresupported in said run-way, including means for tilting a pair offinished companion blanks to cause their knuckles to register and tobring them into coiiperative relation with the pin-driving plunger, areciprocating read, and means carried by said head and coiipera'tivelyengaging the knuckle forming and tilting plungers to reciprocate thesame.

3. In a machine for manufacturing butts and hinges, a run-way forblanks, means to feed blanks through said run-way, means toautomatically form knuckles at the outer edges of said blanks and meansto turn the blanks on their longitudinal axes and cause the knuckles oftwo separate blanks to register.

-:l. In a machine for manufacturing butts and hinges, a bed having alongitudinal run-way, a chute for conveying pairs of blanks into saidrun-way, a member for en gaging each pair of blanks and. feeding themforward in said run-way in contact with the preceding blanks, a seriesof laterally movable plungers arranged along each side of said run wayfor performing different operations upon the blanks while in saidrunavay, each of said plunger-s having a vertical passage, areciprocating head, and cams carried by said head adapted to operate insaid plungerpassages for bringing the plungers into operation.

5. In a machine for manufacturing butts and hinges, a run-way forblanks, a longitudinally movable plunger for feeding blanks through saidrun-way in contact with each other, a reciprocating head, means carriedthereby for crimping the outer edges of blanks supported in saidrunavay, laterally movable plungers arranged on opposite sides of saidrun-way and having undercut portions to engage and curl the crimpededges, means for turning the blanks to aline the knuckles. meansinserting a pin in the alined knuckles, and cams carried by said headfor operating said laterally movable plungers and pin inserting means.

(i. In a machine for manufacturing butts and hinges, a run-way forblanks, a longitudinally movable plungerfor feeding blanks through saidrun-way in contact with eachother, a reciprocating head, shapers carriedthereby for crimping the edges of said shanks, laterally movableplungers for curling the crimped edges into tubular knuckles, filescarried by said head for trimming the ends of the knuckles, laterallymovable plunger-s for turning the blanks and assembling them with theirknuckles in alinement, means for inserting a pin, and a series of camscarried by said head for operating said later-ally movable plungers andpin-inserting means.

7. In a machine for manufacturing butts and hinges, a runway for theblanks, means for feeding blanks into said runway in contact with eachother and in pair,

means for crimping the outer edges of a pair of blanks \vhile supportedin said runway, separate means for curling the crimped edges of saidblanks into tubular knuckles while supported 'in said runway, means fortrimming the ends of the knuckles while supported in said runway, andmeans for turning the blanks on their longitudinal axes to bring theknuckles into alinement \vhile supported in said runway.

S. In a machine for manufacturing butts and hinges, a runaway forsupporting blanks during all the operations of the machine, means tofeed a pair of blanks simultaneously into said runavay, means to crimpthe outer edges of said blanks. means to curl the crimped edges of saidblanks into tubular knuckles, means to trim the ends of adjacentknuckles on one leaf to afford clearance for alternate knuckles on theopposite companion leaf, means to tilt a companion pair offinishedblanks and aline their knuckles, means for feeding pins, means to selertone pin, and means to insert the selected pin through id aliuedknuckles.

In 'a machine for manufacturing butts and hinges, a divided run-way, apresser bar above each part of said run-Way, means for feeding companionblanks into said run-way and beneath said presser bars, means forforming said blanks \vhile held by said presser bars, and means forassembling said blanks when disengaged from said presser bars.

10. In a machine for manufacturing butts and hinges, a run-way, meansfor feeding blanks through said run-way, means laterally of said run-wayto automatically form knuckles at the edge of said blanks, and yieldingpresser bars above said run-way for holding said blanks down intoposition in said run-way during the knuckleforming opera tion.

11. In a machine for manufacturing butts and hinges, a run-\vay, acentral longitudinal part' ion therein, means for feeding companionblanks through said run-way on opposite sides of said partition, meansfor forming knuckles on the outer edges of said blanks to form hingeleaves, means for moving said leaves to bring said knuckles intoalinement above said partition, and means in alinement with theassembled knuckles for automatically inserting a pin thercinto.

12. In a butt and hinge machine, a run-way, a yielding presser bar abovesaid run-way. means for successively feeding blanks beneath said presserbar and into said runway, and means for operating on said blank \vhileheld beneath said presser bar and in said run-way.

13. In a butt and hinge machine, a run-way, a yielding presser bar abovethe runway, means for successively feeding blanks into said run-waybeneath said presser bar, and means for bending the knuckle formingportions of the blanks while held by the presser bar in said run-way.

1-1. A machine of the character described, including a run-way having acentral longitudinal fixed partition for holding the inner edges of theleaf blanks, yielding presser bars along opposite sides of saidpartition, opposed coiiperating shaping dies along the sides of saidpartition in said ruirway, said shaping dies having inclined outeredges, parallel reciprocating shapers cooperating with said dies fromabove and outside of said presser bars, and means for feeding blanksalong said run-way to and from said dies.

15. A machine of the character described, including a run-way having acentral longitudinal partition, opposed cooperating shaping dies alongthe sides of said partition and spaced therefrom and having inclinedouter edges, yielding presser bars above the runway for engaging theblanks and holding them down in said dies, and a sharper adapted tocooperate with the blanks in said dies to crimp knuckle-forming portionson the outer edges.

A machine of the character described, including a blank-holding hopper,and means to hold the blanks there in at an inclination, a shaping-diehaving an inclined sliapingportion in front of said hopper, and acooperating reciprocating plunger in front of said die the forward endthereof being beveled so as to engage only the lowermost blank in saidhopper and convey it to said die, and a vertically movableshaping-plunger coiiperating with said die to crimp the edge of anyblank resting on the die.

18. In a butt and binge machine, a run-Way, a presser bar above therunway, a perforated cover plate above the presser bar, and areciprocating trimmer operable through the perforation in said plate.

19. A machine of the character described, including a runway having alongitudinal partition for supporting the inner edges oL' blanks, meansfor feeding blanks along mid runavay, laterally sliding plunger-s havingundercut portions adapted to engage the previously crimped outer edgesof conumnion blanks and form knuckles.

20. A machine oi the character described, including a run-Way having alongitudinal partition, means for feeding blanks along said run-\vay,laterally sliding plunger-s having undercut portions adapted to engagethe previously crimped outer edges of companion blanks and formknuckles. and :1V pre, er bar above said run\vay for bolding said blanksdown while being operated upon.

21. A machine of the character described, including a stationary bedforming a support for companion blanks having knuckle portions, presscrbars for holding down said blanks. and reciprocating trimmers adapted toen gage the knuckles of said blanks while thus held down.

22. A machine of the character described, including an abutment forsupporting the inner edges of partially formed hinge leaves, a run-Wayon opposite sides of said abutment, laterally n'loving plunger-s havinginclined shouldcrs for engaging lea having finished knuckles and turningthem over on their longitudinal axes to unite the knuckles, and meansfor pinning a pair 01? linished leaves.

A machine of the character described, including a supporting bed, acentral par ition, and means for lit'ting the outer edges of the blanksand placing them against said partition with their knuckles interlocked.

2- A machine of the character described, including a support, a centralpartition acting as an abutment, and laterally moving plungers forpushing the blanks against the partitions and turning them over, saidplunger-s having yielding portions.

:25. A machine of the character described, including a bed and a centralpartition acting as an abutment and laterally moving plungers havinginclined portions adapted to engage the edges 01' the blanks to pushthem against the partition and turn them over and bring their knucklesinto alinemcnt above said partition.

26. A machine 01 the character described, including a central partition'l'orming a support, laterally operating plungers having yieldingportions adapted to engage the knuckles ot a pair of blanks supported onsaid partition. means for selecting a pin and means lfor inserting a pinwhile the knuckles are held by the plungers.

27. in a machine for manufacturing butts and hinges, means forassembling the blanks of a pair with the knuckles in alincment, alaterally movable plunger having a groove adapted to be brought intoline with the knuckles, means for automatically depositing a pin in saidgroove,

1 and means for engaging the pin while resting in said groove to forcethe pin into the knuckles.

28. In a machine for manufacturing butts and hinges, means l'or holdinga pair of blanks with their knuckles in alinement, a pin containinghopper having a cut-away portion to hold the middle part of a single pinpartially exposed, and a laterally movable plunger having a pinselecting hook arranged to make side engagement with the exposed portionol said pin, and a receiving groove below and at the side of said hookto receive a pin detached by said hook and cooperating means to move theplunger so as to bring the pin in said receiving groove into alincmentwith said alined knuckles, and means to drive said pin.

2i). in a machine for manufacturing butts and hinges, means for holdinga pair of blanks with their knuckles in alinement, a pin containinghopper, means at the bottom to support; a single pin and having acutaway portion to expose the middle part of said pin, a spring l'orholding said pin on said support in [rent ot pin selecting hook, and alaterally movable member having a pin selecting hook arranged to engagethe exposed portion olf said pin and remove the same.

3 A machine of the character described, including a bed having alongitudinal runavay, means for feeding blanks along said run-way, meansfor forming knuckles on the blanks while in said run-way, means l'orturning the blanks on edge in said runway and alining the knuckles, andmeans for inserting a pin in the knuckles olf said blanks whilesupported in said runavay.

3 A machine of the character de a-ibed, including feeding, forming andassembling mechanisms, a bed supporting the feeding and part of thelorming and the assembling mechanism, and a vertically reciprocatinghead carrying the remainder ol' the forming mechanism, and cams carriedby said reciprocating head for operating the other portions of theforming mechanism and the assembling mechanism.

32. A machine of the character described, including a feed plunger,knuckleierming plunger-s, assembling plungcrs. a pin-inserting plunger,a support for said plungers, a ver ically reciprocating head and camscarried by said head tor operating said knuckle forming, assembling, andpin inserting plungers.

A machine of the character described, including a central partition,laterally movable plungers for enga ing the outer edges of companionblanks \vhile abutting ainst said partition and forming knuckles, areciprocating head and cams carried by said head operating saidplungcrs.

34. In a machine of the character desc ibcd, a support for a pair ofcompanion hinge leaves oppositely arranged with their knuckles at theirouter edges, oppositely arranged leat turning and knuckle aliningplungers, each plunger comprising a r' 'id upper part and a. yieldingshovel-nosed low part arranged to slide under and lil't the outer edgeof the adjacent blank preparatory to turning the same.

\VlLLlAM r. 'lltASli.

Witnesses WM. V. COLLINS, Winnur, F. Ginnnn'r.

esections in Letters Patent N 869,998- 4 His hereby certified that inLetters Patent No. 869,998, granted November 5, 1907,

upon the application of William S. Trask, of New Britain, Connecticut,for an improve ment in Machines for Making Butts and Hinges, errorsappear in the printed specification requiring correction, as follows: Onpage 3, line 66, the Word shanks should read blanks; same page, line 76,the Word pair should read pairs, and page 4, line 42, the wordpartitions should read partition; and that the said Letters Patentshould be read with these corrections therein that the same may conformto the record of the case in the Patent Office.

Signed and sealed this 26th day of November, A. D., 1907. [SEAL] E. B.MOORE,

Commissioner of Patents.

